Gas grill



FIG. 1 is a front view of a gas grill;

FIG. 2 is a top view of the gas grill shown in FIG. 1;

FIG. 3 is a side view of the gas grill shown in FIG. 1; and,

FIG. 4 is a front perspective view of the gas grill shown in FIG. 1.

The details shown in broken lines form no part of the claimed design. 

We claim the ornamental design for a gas grill, as shown and described. 